Yes, the idea came from the theme. I wanted you to give them time to grow. My first idea was to be a bubble farmer... You needed to try to get the largest bubble you can and remove the "weeds" that hinder its growth. The reward function does not really support it. There is a better reward to harvest as many bubbles as possible and not let the same colors merge. When opposite colors are about to touch, you need to harvest the larger bubble.